US3873025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for atomizing a liquid medium and for spraying the atomized liquid medium in a predetermined direction
Assignee: Stora Enso Oyj
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Filing: 1974-05-06
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Granted: 1975-03-25
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Expires: 1994-05-06
Abstract
Abstract A coating method and apparatus with which a liquid medium is passed to the nip of two co-acting rolls and atomized therein. One of the rolls comprises a spreader roll having an elastomeric open porous lining, while the other comprises a pressure roll adapted to depress the spreader roll lining along the roll nip to change the kinetic state of the liquid passing through the nip.
Inventors
- 👤 Bengt Qvarnstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:15
CPC Classifications
D; D06; D06B; D06B1/00; D06B1/02; B; B05; B05B; B05B13/00; B05B13/02; B05B13/0207; B05B17/00; B05B17/04; B05B3/00; B05B3/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
A method for spraying an atomized liquid medium in a predetermined direction, particularly for coating or moistening a material continuously advanced in the path of the atomized medium, characterized in that the liquid medium is passed to a surface layer of elastomeric open porous material on a spreader roll, rotating this roll, passing said surface layer through the nip between said spreader roll and a press roll, thereby causing said press roll to compress said surface layer along the roll nip to atomize the liquid film into free droplets which are ejected from the roll nip in the form of a continuous liquid spray, as a result of rapid changes in the radial dimension of the spreader roll.
Claim 2
Independent Claim
118 words
A method for spraying an atomized liquid medium in a predetermined direction, particularly for coating or moistening a material continuously advanced in the path of the atomized medium, characterized in that the liquid medium is passed to a surface layer of elastomeric open porous material on a spreader roll, rotating this roll, passing said surface layer through the nip between said spreader roll and a press roll, thereby causing said press roll to compress said surface layer along the roll nip to atomize the liquid film into free droplets which are ejected from the roll nip in the form of a continuous liquid spray, as a result of rapid changes in the radial dimension of the spreader roll.
Claim 3
Independent Claim
163 words
An apparatus for spreading an atomized liquid medium in a predetermined direction, characterized in that said apparatus comprises a spreader roll, the speed of which can be regulated and which is provided with a layer of elastomeric open porous material, means for continuously applying to the periphery of the spreader roll a uniform supply of the liquid medium to be spread, and a press roll which rotates in abutment with the periphery of the spreader roll and which at least during a working revolution of said spreader roll is pressed into the outer surface layer thereof to a limited extent, the depression extending linearly along the whole length of the spreader roll and being of such magnitude that the liquid medium, owing to the change in the kinetic state of the liquid film as a result of said depression, is torn from the surface of the spreader roll in the form of droplets and forms a continuous spray directed from the spreader roll.
Claim 4
Independent Claim
163 words
An apparatus for spreading an atomized liquid medium in a predetermined direction, characterized in that said apparatus comprises a spreader roll, the speed of which can be regulated and which is provided with a layer of elastomeric open porous material, means for continuously applying to the periphery of the spreader roll a uniform supply of the liquid medium to be spread, and a press roll which rotates in abutment with the periphery of the spreader roll and which at least during a working revolution of said spreader roll is pressed into the outer surface layer thereof to a limited extent, the depression extending linearly along the whole length of the spreader roll and being of such magnitude that the liquid medium, owing to the change in the kinetic state of the liquid film as a result of said depression, is torn from the surface of the spreader roll in the form of droplets and forms a continuous spray directed from the spreader roll.
Claim 5
Dependent Claim
82 words
An apparatus according to claim 2, characterized in that the distance between the spreader roll and the press roLl is so adapted that when stationary the two rolls at the most just touch each other, the surface lining of the spreader roll being comprised of a material of such elasticity that when the spreader roll rotates at full working speed an increase in diameter is obtained which provides the requisite abutment of said spreader roll with the surface of the press roll.
Claim 6
Dependent Claim
33 words
An apparatus according to claim 2, characterized in that the spreader roll has a displaceable centre axis for controlling the distance between the centre axes of the press roll and the spreader roll.
Claim 7
Dependent Claim
84 words
An apparatus according to claim 2, characterized in that said means for supplying the liquid medium to the spreader roll comprises an applicator roll, which is arranged to be pressed at least to a limited extent into the surface of the spreader roll at its point of contact therewith, and that the press roll is arranged generally opposite the nip between the spreader roll and the applicator roll on the exit side of said nip and adjacent to but free from the applicator roll.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |